#include <stdio.h>

void encrypt(char *s);

int main() {
    char line[100];
    gets(line);
    encrypt(line);
    puts(line);
    return 0;
}

void encrypt(char *s) {
    for (; *s != '\0'; s++) {
        if (*s == 'z')
            *s = 'a';
        else
            *s = *s + 1;
    }
}
